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Improvement in fracture toughness and impact resistance of E-glass/epoxy composites using layers composed of hollow poly(ethylene terephthalate) fibers
Journal of Industrial Textiles ( IF 3.2 ) Pub Date : 2021-09-24 , DOI: 10.1177/15280837211044910
Reyhaneh Laghaei 1 , Seyyed Mahdi Hejazi 1 , Hossein Fashandi 1 , Saleh Akbarzadeh 2 , Samira Shaghaghi 3 , Alireza Shamaei-Kashani 3
Affiliation  

Incorporation of hollow fibers in polymer base composites has gained great interest due to their flexibility and lightweight structure. Among many research studies on this subject, the mechanical performance of polyester hollow fiber/E-glass reinforced polymer composites has not been investigated. The main objective of the present work was to investigate the fracture toughness and impact resistance of E-glass/epoxy composites hybridized by a separate layer of polyethylene terephthalate hollow fibers (PETHFs). The samples were prepared by placing a layer of PETHFs in different contents (0, 0.23, 1.18, or 2 wt.%) and in two different forms of filaments (PETHF-FIs) or staple fibers (PETHF-STs) between two layers of biaxial or triaxial E-glass fabrics. The mechanical behaviors of the samples were investigated by performing a set of tensile and impact tests. Scanning Electron Microscopy (SEM) and Field Emission Scanning Microscopy (FESEM) were also used to evaluate the surface morphologies of the hollow fibers and the fractured samples. The results revealed that, unlike PETHF-FIs, PETHF-STs could weaken the mechanical performance of the pristine E-glass/epoxy composites. The internal channel blockage of PETHF-STs was observed in the FESEM images of the fractured PETHF-STs hybrid samples. The highest toughening effects were observed with incorporation of 1.18 wt.% PETHF-FIs in biaxial E-glass/Epoxy composites and 2 wt.% PETHF-FIs in triaxial E-glass/Epoxy composites. The highest value of impact resistance belonged to the samples hybridized with 2 wt.% of PETHF-FIs. Crack deflection, fiber pull out, and fiber stretching were the predominant fracture mechanisms observed in the PETHF-FIs hybrid composites.



中文翻译:

使用由中空聚(对苯二甲酸乙二酯)纤维组成的层提高 E 玻璃/环氧树脂复合材料的断裂韧性和抗冲击性

由于中空纤维的柔韧性和轻质结构,在聚合物基复合材料中加入中空纤维引起了极大的兴趣。在这方面的许多研究中,聚酯中空纤维/无碱玻璃增强聚合物复合材料的力学性能尚未得到研究。本工作的主要目的是研究由单独的聚对苯二甲酸乙二醇酯中空纤维 (PETHF) 层混合的 E 玻璃/环氧树脂复合材料的断裂韧性和抗冲击性。通过将一层不同含量(0、0.23、1.18 或 2 wt.%)的 PETHFs 和两种不同形式的长丝 (PETHF-FIs) 或短纤维 (PETHF-STs) 放置在两层双轴或三轴无碱玻璃织物。通过进行一组拉伸和冲击试验来研究样品的机械性能。扫描电子显微镜 (SEM) 和场发射扫描显微镜 (FESEM) 也用于评估中空纤维和断裂样品的表面形貌。结果表明,与 PETHF-FIs 不同,PETHF-STs 会削弱原始 E 玻璃/环氧树脂复合材料的机械性能。在断裂的 PETHF-STs 混合样品的 FESEM 图像中观察到 PETHF-STs 的内部通道阻塞。在双轴 E-玻璃/环氧树脂复合材料中加入 1.18 wt.% PETHF-FIs 和在三轴 E-玻璃/环氧树脂复合材料中加入 2 wt.% PETHF-FIs 时,观察到最高的增韧效果。耐冲击性的最高值属于与 2 wt.% PETHF-FIs 杂交的样品。裂纹偏转,

更新日期:2021-09-24
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